Temperature-difference radiating apparatus

ABSTRACT

A temperature-difference radiating apparatus comprises a radiating fan, a valving cylinder, a power cylinder and a vessel. The radiating fan and the valving cylinder are connected to both sides of the radiating fan through a first link and a second link, respectively. The air in the valving cylinder is communicated with air in the power cylinder through the vessel. A CPU to be cooled can be placed below the valving cylinder and the heat generated by the CPU can expand the air in the valving cylinder and the power cylinder to repeatedly drive the first link and the second link. Therefore, the radiating fan is rotated by the first link and the second link to remove the heat generated by the CPU.

FIELD OF THE INVENTION

[0001] The present invention relates to a temperature-difference radiating apparatus, especially to a radiating apparatus energized by temperature difference and volume variation to drive a radiating fan.

BACKGROUND OF THE INVENTION

[0002] As the processing speed of computer increases, the CPU of the computer consumes more power and generates more thermal energy. Moreover, as more adaptor cards are connected to motherboard of the computer, the power consumption and thermal energy are also increased. Therefore, the heat dissipation ability and stable power are crucial for nowadays computers.

[0003]FIG. 1 shows a conventional radiating fan 1 a for computer. The radiating fan 1 a and a heat sink 2 a constitute a heat radiation apparatus and the heat radiation apparatus is placed atop a CPU 4 a on a motherboard 3 a. The radiating fan 1 a is connected to a power supply (not shown) of the computer through a connection cord 11 a and functioned to remove heat generated by the CPU 4 a.

[0004] However, in above-mentioned heat radiation apparatus, the radiating fan 1 a has limited heat-removing ability. Moreover, the radiation fan 1 a also consumes considerable electrical power and also generates thermal energy per se.

SUMMARY OF THE INVENTION

[0005] It is an object of the present invention to provide a radiating apparatus energized by temperature difference and volume variation to drive a radiating fan.

[0006] It is another object of the present invention to provide a temperature-difference radiating apparatus wherein a thermal source is used to replace the electric power.

[0007] It is still another object of the present invention to provide a temperature-difference radiating apparatus wherein the rotation speed of a radiating fan can be automatically adjusted with reference to outside temperature.

[0008] To achieve above object, the present invention provides a temperature-difference radiating apparatus comprising a radiating fan, a valving cylinder, a power cylinder and a vessel. The radiating fan and the valving cylinder are connected to both sides of the radiating fan through a first link and a second link, respectively. The air in the valving cylinder is communicated with air in the power cylinder through the vessel.

[0009] The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:

BRIEF DESCRIPTION OF DRAWINGS

[0010]FIG. 1 shows a conventional radiating fan 1 a for computer;

[0011]FIG. 2 shows an exploded view of the present invention;

[0012]FIG. 3 shows a perspective view of the present invention;

[0013]FIG. 3 shows a sectional view of the present invention;

[0014]FIG. 4 shows a first operation stage of the temperature-difference radiating apparatus according to the present invention;

[0015]FIG. 5 shows a second operation stage of the temperature-difference radiating apparatus according to the present invention;

[0016]FIG. 6 shows a third operation stage of the temperature-difference radiating apparatus according to the present invention; and

[0017]FIG. 7 shows a fourth operation stage of the temperature-difference radiating apparatus according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0018]FIGS. 2 and 3 show an exploded view and a perspective of the present invention. The present invention provides a temperature-difference radiating apparatus comprising a radiating fan 1, a valving cylinder 3, a power cylinder 5 and a vessel 7.

[0019] The radiating fan 1 is a blast fan and has a first projecting shaft 11 on one side and a second projecting shaft 12 on another side. The valving cylinder 3 comprises an upper cylinder body 31, a lower cylinder body 32 and a valving piston 33 therein. The upper cylinder body 31 has a radiating member 34 on outer wall thereof. The valving piston 33 is fixed in the valving cylinder 3 by two retaining rods 35 and can be move forward and backward along the two retaining rods 35. The valving piston 33 has a first crank link 36 on one side thereof and the first crank link 36 has a first pivotal hole 37 on one end thereof and fit with the first projecting shaft 11 of the radiating fan 1. The power cylinder 5 has a radiating member 51 on outer wall thereof and contains a power piston 52 therein. The power piston 52 has a second crank link 53 on one side thereof and the second crank link 53 has a second pivotal hole 54 on one end thereof and fit with the second projecting shaft 12 of the radiating fan 1. The vessel 7 is connected between the valving cylinder 3 and the power cylinder 5 such that air in the valving cylinder 3 and the power cylinder 5 can be communicated with each other. Moreover, the radiating fan 1 can also be an axial fan (not shown).

[0020] As shown in FIG. 4, a thermal source 9 is provided outside the valving cylinder 3. The air in the valving cylinder 3 is heated or cooled to have expanded or shrunk volume. The valving piston 33 and power piston 52 are therefore moved forward or backward. The first crank link 36 and the second crank link 53 are driven by the valving piston 33 and power piston 52 to rotate the radiating fan 1.

[0021]FIG. 4 shows a first operation stage of the temperature-difference radiating apparatus according to the present invention. A thermal source 9 is provided outside the valving cylinder 3 and the air in the valving cylinder 3 is heated to have expanded volume. The valving piston 33 is moved outward to push the first crank link 36 and to rotate the radiating fan 1.

[0022]FIG. 5 shows a second operation stage of the temperature-difference radiating apparatus according to the present invention. The heated air is flowed from the valving cylinder 3 to the power cylinder 5. The power piston 52 is moved outward to push the second crank link 53 and to rotate the radiating fan 1.

[0023]FIG. 6 shows a third operation stage of the temperature-difference radiating apparatus according to the present invention. At this time, most of heated air in the valving cylinder 3 is flowed to the power cylinder 5. The heated air flowed to the power cylinder 5 is cooled by the radiating member 51 to have shrunk volume and the remained heated air in the valving cylinder 3 is cooled by the radiating member 34 to have shrunk volume. The valving piston 33 and power piston 52 are therefore moved inward, and the first crank link 36 and the second crank link 53 are linked to rotate the radiating fan 1.

[0024]FIG. 7 shows a fourth operation stage of the temperature-difference radiating apparatus according to the present invention. The air in the power cylinder 5 is flowed back to the valving cylinder 3 through the vessel 7 when the power piston 52 is moved inward. Therefore, the second crank link 53 is linked to rotate the radiating fan 1. Moreover, the air in the valving cylinder 3 is again heated by the thermal source 9 and the operation of the temperature-difference radiating apparatus according to the present invention is back to the state as shown in FIG. 4. Therefore, the radiating fan 1 is kept rotating as the thermal source 9 is present.

[0025] As can be seen from above description, the thermal source 9 can be a CPU operating in a computer. Moreover, the radiating fan 1 has faster rotating speed when the temperature of the CPU is high. The heat dissipated to the radiating members 34 and 51 can be blown away by the radiating fan 1. The valving cylinder 3 and the power cylinder 5 can be made of thermally conductive material. The temperature of the CPU can be further reduced when the CPU is attached to outer wall of the valving cylinder 3.

[0026] Moreover, the first projecting shaft 11 has 90 degree offset to the second projecting shaft 12 with reference to the rotation axis of the radiating fan 1. Therefore, the radiating fan 1 has stable rotation direction.

[0027] To sum up, the radiating fin assembly of the present invention has following features:

[0028] (1) The driving power is provided by volume variation with caused by temperature variation.

[0029] (2) A thermal source is used to replace the electric power.

[0030] (3) The rotation speed of radiating fan is increased as the temperature of the thermal source is increased.

[0031] Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims. 

I claim:
 1. A temperature-difference radiating apparatus comprising: a radiating fan; a valving cylinder having a valving piston therein, the valving piston having a first link on one side thereof and connected to one end of the radiating fan; a power cylinder having a power piston therein, the power piston having a second link on one side thereof and connected to another end of the radiating fan; a vessel through which air in the valving cylinder is communicated with air in the power cylinder.
 2. The temperature-difference radiating apparatus as in claim 1, wherein the radiating fan is a blast fan or an axial fan.
 3. The temperature-difference radiating apparatus as in claim 1, wherein the first link has a first pivotal hole connected to a first projecting shaft on one side of the radiating fan.
 4. The temperature-difference radiating apparatus as in claim 1, wherein the first link has a second pivotal hole connected to a second projecting shaft on another side of the radiating fan.
 5. The temperature-difference radiating apparatus as in claim 1, wherein the valving cylinder has a radiating member on an outer wall thereof.
 6. The temperature-difference radiating apparatus as in claim 1, wherein the power cylinder has a radiating member on an outer wall thereof.
 7. The temperature-difference radiating apparatus as in claim 1, wherein the first link is a crank link.
 8. The temperature-difference radiating apparatus as in claim 1, wherein the second link is a crank link.
 9. The temperature-difference radiating apparatus as in claim 1, wherein the first projecting shaft has a predetermined angle offset to the second projecting shaft with reference to the a rotation axis of the radiating fan.
 10. The temperature-difference radiating apparatus as in claim 1, wherein the predetermined angle offset is 90 degree. 